Not the 1975 insect horror, but the latest film from William Friedkin: a claustrophobic chamber-drama, set almost entirely in a motel room. Tracy Letts has written the script, based on his original stage-play, and its theatrical origins are obvious. Yet the sheer freakiness and psychotic commitment of the actors keep you watching. It starts off like a horror film, or like a modern-day Tennessee Williams piece and then transmutes into ... something very different indeed.